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Mathematics
10th -
12thgrade
Unit 3 Review: Sampling, bias, and experimental design.
20 questions
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- 1. Multiple ChoiceSource of bias in which people CHOOSE to respond and usually only people with very strong opinions respondResponse BiasUndercoverageConvenience SamplingVoluntary Response
- 2. Multiple ChoiceSource of bias in which some groups of populations are LEFT OUT of the selection processResponse BiasUndercoverageConvenience SamplingVoluntary Response
- 3. Multiple ChoiceSource of bias that occurs when you ask people who are EASY to askResponse BiasConvenience SamplingNonresponseVoluntary Response
- 4. Multiple ChoiceMarianne wanted to know students' opinion on the new schedule at school. She places students' names in a container and randomly picks out 20 names.Convenience SamplingSystematic Random SamplingSimple Random SamplingVolunteer response
- 5. Multiple ChoiceWhy do we randomly select our samples?for controlreduce biasso we don't get the same answers from everyoneto eliminate confounding results
- 6. Multiple ChoiceThe teacher samples her class by selecting all students sitting at group 1 and group 5 in her classroom. This sampling technique is called?SRSStratifiedSystematicCluster
- 7. Multiple ChoiceAt a middle school, the 7th graders will conduct a survey for where to go on a field trip. Which method will result in the least biased decision?to randomly ask 8th grade students who went on a field trip last yearto randomly choose some 7th grade students to select a locationto ask all 7th grade teachers and administrators for a locationto ask the student council to choose a location
- 8. Multiple ChoiceEach student in the school is given a different number. A student is randomly selected from the first 25. That student and every 25th student thereafter are in the sample. This is what type of sampling design?SRSSystematicMultistageStratitfied
- 9. Multiple ChoiceAn SRS of 25 students is taken from each grade to form the sample. This is what type of sampling design?ClusterSRSStratifiedMultistage
- 10. Multiple ChoiceStarting at 8:00 Monday morning the first 50 students entering the front doors are selected to be in the sample. This is what type of sampling design?SystematicVoluntary ResponseClusterConvenience
- 11. Multiple ChoiceA ___ is a small portion of the population used to gather data from.Systematic Sampling MethodSamplePopulationBias
- 12. Multiple Choice
Strata are
homogeneous
heterogeneous
heterozygous
heterophonous
- 13. Multiple ChoiceIdentify the sampling design: SCPS wants to survey its employees. They pick 4 schools from the county and survey every single employee in each of the 4 buildings.clustervolunteersystematicsimple random
- 14. Multiple Choice
Which is not a method of random selection?
Using a table of random digits
Using a random number generator
Drawing numbers out of a hat
Randomly pointing to numbers on a page
- 15. Multiple Choice
Which sampling method reduces variability?
SRS
Stratified
Cluster
Systematic
- 16. Multiple Choice
Frannie and Fiona collect data comparing students' GPA and how many hours per week they spend doing extracurricular activities. This is best described as a(n)
observational study
matched pairs design
experiment
survey
- 17. Multiple Choice
To check the effect of hot temperatures on the elasticity of two brands of rubber bands, one box of Brand A and one box of Brand B rubber bands are tested. Ten bands from the Brand A box are placed in a warm car in the sun for two hours and ten bands from the Brand B box are kept at room temperature. The amount of stretch before the breakage is measured on each rubber band, and the mean for the hot bands is compared to the mean for the others. Is this a good experimental design?
No, because the means are not proper statistics for comparison.
No, because more than two brands should be used.
No, because more temperatures should be used.
No, because temperature is confounded with brand.
Yes
- 18. Multiple ChoiceCompare the grades on a final math test of 25 students who use calculators and 25 students who do not use calculators. The students decide which group they are in.ExperimentObservational Study
- 19. Multiple Choice210 college students were randomly assigned to play either a violent or nonviolent video game. A short time later, the students were presented with the opportunity to trivially harm another person and results comparing the two groups were recorded.
Is this study OBSERVATIONAL or EXPERIMENTAL?ObservationalExperimental - 20. Multiple Choice
A reading specialist in a large public school system believes that the more time students spend reading, the better they will do in school. She plans a middle school experiment in which an SRS of 30 eighth graders will be assigned four extra hours of reading per week, and SRS of 30 seventh graders will be assigned two extra hours or reading per week, and an SRS of 30 sixth graders with no extra assigned reading will be a control group. After one school year, the mean GPAs from each group will be compared. Is this a good experimental design?
Yes
No, because while this design may point out an association between reading and GPA, it cannot establish a cause-and-effect relationship.
No, because without blinding, there is a strong chance of a placebo effect.
No, because any conclusion would be flawed because of blocking bias.
No, because grade level is a lurking variable which may well be confounded with the variables under consideration.
- Answer choicesTagsAnswer choicesTags